these clients use system\iteminfo.lub
this converter converts your files you used from 2012-04-10 to iteminfo.lub format!!
http://rathena.org/board/topic/66795-itemconverter/
thanks to
xazax
yep np,
what I would do is rip the whole data.grf, so you don' to depend on it, and delete parts of teh wav files every so often and see which one is effecting it